#if defined(GL_FRAGMENT_PRECISION_HIGH)// 原来的写法会被我们自己的解析流程处理，而我们的解析是不认内置宏的，导致被删掉，所以改成 if defined 了
	precision highp float;
	precision highp int;
#else
	precision mediump float;
	precision mediump int;
#endif

uniform vec4 u_PickColor;

#define SHADER_NAME meshpick

void main()
{
  gl_FragColor = u_PickColor; 
  gl_FragColor.a = 1.0;
}

